A U.S. senator says the hospitalized suspect in the Boston Marathon bombing was shot in the throat, raising questions about his ability to speak to investigators.

Senate Intelligence Committee member Sen. Dan Coats of Indiana told ABC's "This Week" that there are questions over whether Dzhokhar Tsarnaev will be able to talk again.

Coats said that doesn't mean the 19-year-old can't communicate, but he's "in a condition where we can't get any information from him at all."

Earlier today, Boston's police commissioner said the lone surviving suspect in the Boston Marathon bombing was in serious condition and authorities have not been able to try to interrogate him.

Davis says it's his belief that 19-year-old Dzhokhar Tsarnaev and his 26-year-old brother Tamerlan "were going to attack other individuals" — and Davis says that's based on the evidence at the scene and the firepower that the brothers had.

Fox News reports that Tsarnaev has suffered injuries to his neck and throat leaving him unable to speak.

Tamerlan died in the gunbattle with police in Watertown.

Davis says "this was as dangerous as it gets in urban policing."

Video shows bomb suspect dodging blast

Massachusetts Gov. Deval Patrick says surveillance video from the Boston Marathon attack shows the suspect putting his backpack down and moving away in time to avoid being injured by the blast of the bomb inside it.

Speaking Sunday on NBC, Patrick says the video clearly puts 19-year-old Dzhokhar Tsarnaev at the scene of the attack. Tsarnaev is in serious condition at a Boston hospital after his capture Friday.

Patrick says the video is "pretty clear about his involvement and pretty chilling, frankly."

He says he hasn't viewed all the surveillance tapes but has been briefed by law enforcement about them.

Tsarnaev's older brother, Tamerlan, is also considered a suspect. He died in a gunbattle with police earlier Friday.

Investigators have determined the bombs were fashioned from pressure cookers packed with explosives, nails and ball bearings.

Boston mayor: Bombing suspects acted alone

People on Newbury Street (TOP) watch and walk past crime scene investigators, Boston police officers and military personnel at a still cordoned off section near the scene of the Boston Marathon bombings on the day after the second suspect was captured (Mario Tama/Getty Images)

Boston Mayor Tom Menino says information he has indicates that the suspects in the Boston Marathon bombing acted alone.

Menino tells ABC's "This Week" that he agreed with the decision to lock down Boston all day Friday, based on information officials had at the time.

He tells ABC's 'This Week" that a pipe bomb was found at another location and that another person was taken into custody. The mayor did not elaborate.

Lawmaker: Enough evidence to convict bomb suspect

The chairman of the House Intelligence Committee believes there's enough evidence against the suspected Boston marathon bomber to convict him.

Rep. Mike Rogers of Michigan tells NBC's "Meet the Press" that he's not worried that the government has decided against reading the suspect his Miranda rights. He says FBI agents need to know whether there are other bombs more than they need to use in court what the suspect might tell them.

Rogers, a former FBI agent, says there is so much evidence against the suspect that a conviction should be easy.

Photo shows slain, injured Mass. officers together

A Watertown resident holds up a collection of balloons, each with a name of those killed in the last week by the Boston Marathon suspected bombers, during a candlelight vigil at Victory Park in Watertown, Massachusetts. ( Jared Wickerham/Getty Images)

A vigil has been held in Massachusetts for an MIT police officer authorities say was shot and killed by the alleged Boston Marathon bombers.

Hundreds turned out Saturday night in Wilmington to honor 26-year-old Sean Collier, who grew up in the town about 15 miles north of Boston.

Authorities say Collier was shot in his cruiser Thursday night on the MIT campus in Cambridge. He lived in Somerville and was preparing to become a police officer in that city.

The Boston transit agency on Sunday released a photo of Collier with Richard Donohue, the 33-year-old transit police officer who remains hospitalized after authorities said was seriously wounded in a gun battle with the bombing suspects.

The photo was from a 2010 graduation ceremony at the Municipal Police Officers' Academy.